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ADS131a04数据采集问题

Other Parts Discussed in Thread: ADS131A04

大家好,我在使用ads131a04过程中出现一个问题,我是使用外部参考电压模式,参考电压为2.5V,ADC前端输入差分信号,AINP和AINN输入信号峰峰值为700mVpp,ADC采用16位数据长度,所以理论采集数据最大输出为32768/2.5*0.7=9175,但是实际采集得到的最大数据为16832,约为理论的1.8倍,adc时钟为16.384M,a_sys_cfg=x"0b60", d_sys_cfg=x"0c3c",clk1_cfg=x"0d02",clk2_cfg=x"0e2b",adc_gain=1,各种命令配置及回应都正常,只是采集数据出现上述情况,请问这个有可能是什么引起的?